// OpenHarmony Driver Adapter for ZENrs
// This module provides an adapter layer to run OpenHarmony drivers on ZENrs

use crate::driver_manager::DriverInterface;
use std::collections::HashMap;
use std::sync::Mutex;

// OpenHarmony Driver structure
pub struct OpenHarmonyDriver {
    pub name: String,
    pub description: String,
    pub version: String,
    pub module_params: HashMap<String, String>,
    pub private_data: Option<*mut u8>,
}

impl OpenHarmonyDriver {
    // Convert OpenHarmonyDriver to DriverInterface
    pub fn to_driver_interface(&self) -> DriverInterface {
        DriverInterface {
            name: self.name.clone(),
            description: self.description.clone(),
            version: self.version.clone(),
            init: Some(openharmony_driver_init),
            deinit: Some(openharmony_driver_deinit),
            probe: Some(openharmony_driver_probe),
            remove: Some(openharmony_driver_remove),
            ioctl: Some(openharmony_driver_ioctl),
            private_data: self.private_data,
        }
    }
}

// Driver adapter manager
pub struct OpenHarmonyDriverAdapterManager {
    drivers: Mutex<HashMap<String, *mut OpenHarmonyDriver>>,
}

impl OpenHarmonyDriverAdapterManager {
    pub fn new() -> Self {
        OpenHarmonyDriverAdapterManager {
            drivers: Mutex::new(HashMap::new()),
        }
    }

    pub fn register_driver(&self, driver: *mut OpenHarmonyDriver) {
        let driver_name = unsafe { (*driver).name.clone() };
        self.drivers.lock().unwrap().insert(driver_name, driver);
    }

    pub fn unregister_driver(&self, driver_name: &str) {
        self.drivers.lock().unwrap().remove(driver_name);
    }

    pub fn get_driver(&self, driver_name: &str) -> Option<*mut OpenHarmonyDriver> {
        self.drivers.lock().unwrap().get(driver_name).cloned()
    }
}

// Global adapter manager instance
lazy_static::lazy_static! {
    static ref ADAPTER_MANAGER: OpenHarmonyDriverAdapterManager = OpenHarmonyDriverAdapterManager::new();
}

// Driver interface functions

pub unsafe extern "C" fn openharmony_driver_init(private_data: *mut u8) -> bool {
    println!("OpenHarmony driver adapter: init called");
    // In a real implementation, we would call the OpenHarmony driver's init function
    true
}

pub unsafe extern "C" fn openharmony_driver_deinit(private_data: *mut u8) {
    println!("OpenHarmony driver adapter: deinit called");
    // In a real implementation, we would call the OpenHarmony driver's deinit function
}

pub unsafe extern "C" fn openharmony_driver_probe(private_data: *mut u8, device_info: *mut u8) -> bool {
    println!("OpenHarmony driver adapter: probe called");
    // In a real implementation, we would call the OpenHarmony driver's probe function
    true
}

pub unsafe extern "C" fn openharmony_driver_remove(private_data: *mut u8, device_info: *mut u8) {
    println!("OpenHarmony driver adapter: remove called");
    // In a real implementation, we would call the OpenHarmony driver's remove function
}

pub unsafe extern "C" fn openharmony_driver_ioctl(
    private_data: *mut u8,
    device_info: *mut u8,
    cmd: u32,
    arg: *mut u8,
) -> isize {
    println!("OpenHarmony driver adapter: ioctl called with cmd: {}", cmd);
    // In a real implementation, we would call the OpenHarmony driver's ioctl function
    0
}

// OpenHarmony API simulation functions

// Memory allocation functions
extern "C" pub fn LOS_MemAlloc(pool: *mut u8, size: u32) -> *mut u8 {
    // In a real implementation, we would allocate memory from the specified pool
    let layout = std::alloc::Layout::from_size_align(size as usize, 8).unwrap();
    unsafe { std::alloc::alloc(layout) }
}

extern "C" pub fn LOS_MemFree(pool: *mut u8, ptr: *mut u8) {
    // In a real implementation, we would free memory back to the specified pool
    let layout = std::alloc::Layout::from_size_align(0, 8).unwrap();
    unsafe { std::alloc::dealloc(ptr, layout) }
}

// Driver registration functions
extern "C" pub fn register_driver(name: *const i8, ops: *mut u8, mode: u32, data: *mut u8) -> i32 {
    println!("OpenHarmony driver adapter: register_driver called for {:?}", unsafe { std::ffi::CStr::from_ptr(name).to_str() });
    // In a real implementation, we would register the driver with ZENrs driver manager
    0
}

extern "C" pub fn unregister_driver(name: *const i8) -> i32 {
    println!("OpenHarmony driver adapter: unregister_driver called for {:?}", unsafe { std::ffi::CStr::from_ptr(name).to_str() });
    // In a real implementation, we would unregister the driver from ZENrs driver manager
    0
}

// Logging functions
extern "C" pub fn printk(fmt: *const i8, ...) {
    // In a real implementation, we would format and print the log message
    println!("OpenHarmony printk: (format string at {:p})");
}